TableLookupIntFloat

Overview

Table lookup where the input serves as an index into a lookup table

Discussion

Performs table lookup where the input pin is treated as an integer index. The length of the lookup table L is specified at instantiation time. The data on the input pin is clipped to the range [0 L-1] and then used as an index into the lookup table. The lookup table contains floating-point values and these are output.

When bypassed the module is still active and continues to perform the look up function.

Module Pack

Advanced

ClassID

classID = 1342

Type Definition

typedef struct _ModuleTableLookupIntFloat
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
INT32 L;                                      // Number of entries in the table
FLOAT32* table;                               // Table of lookup values
} ModuleTableLookupIntFloatClass;

Variables

Properties

Name	Type	Usage	isHidden	Default Value	Range	Units
L	int	const	0	8	Unrestricted
table	float*	parameter	0	[8 x 1]	Unrestricted

Pins

Input Pins


Name	in
Description	index
Data type	int
Channel range	Unrestricted
Block size range	Unrestricted
Sample rate range	Unrestricted
Complex support	Real

Output Pins


Name	out
Description	lookup value
Data Type	float

Matlab Usage

File Name: table_lookup_int_float_module.m 
 M = table_lookup_int_float_module(NAME, L) 
 Creates a table lookup module for use in the Audio Weaver environment. 
 The module has an integer input pin and uses this as an index to lookup 
 values in a table.  The output data and the data in the table are 
 floating-point values.   Arguments: 
    NAME - name of the module. 
    L - size of the table.